Face feature extraction based on reduced-dimension matrix of DCT and projection of block covariance matrix.
Xianghua HouHonghai LiuPublished in: EMEIT (2011)
Keyphrases
- covariance matrix
- feature extraction
- principal component analysis
- face images
- dct coefficients
- transformation matrix
- positive definite
- covariance matrices
- eigenvalues and eigenvectors
- pseudo inverse
- discrete cosine transform
- feature vectors
- frequency domain
- sample size
- symmetric matrix
- correlation matrix
- dimensionality reduction
- mahalanobis distance
- gaussian mixture
- feature selection
- eigendecomposition
- multivariate gaussian
- face recognition
- image compression
- feature space
- objective function
- principal components
- geometrical interpretation
- class conditional densities
- feature representation
- projection matrix
- transform domain
- dimension reduction
- evolutionary algorithm
- null space
- image processing